"People who feel sleepy when they drink coffee" have a common constitution

"When I drink coffee, I feel sleepy for some reason..."
Don't you have such an experience?

In general, coffee is a symbol of "sleepiness".
However, some people have a strange experience of on the contrary, becoming sleepy.
In fact, this may be a sign of a certain constitution.

Caffeine = awakening, doesn't it work?

Caffeine has the effect of stimulating and waking up the brain.
That's why many people feel that their eyes are clearer and their concentration improves.

However, some people react with sluggishness, sleepiness, and conversely, dazed.
This is not "caffeine doesn't work", but it is more likely that it is a "constitution that does not fit".

The cause is the difference in "caffeine metabolizing enzymes"

Caffeine is broken down by enzymes in the liver (CYP1A2).
There are genetic differences in the work of this enzyme, which can be divided into two types:

• Fast metabolic type: Breaks down caffeine quickly → Easy to feel the wakefulness effect
• Slow metabolic type: takes a long time to break down → puts a strain on the body for a long time

The latter people have caffeine that remains longer and continues to stimulate the nerves,
The autonomic nervous system can cause the opposite reaction of confusion → drowsiness and fatigue.

What kind of person is a "sleepy constitution"?

People who get sleepy from coffee have some common constitutional tendencies.

People with disturbed autonomic nervous system

People who are sensitive to stress and fatigue and are prone to imbalance between relaxation and tension,
Nerve switches may not switch properly due to caffeine stimulation.
As a result, I am in a state of "dazedness" and "sleepiness".

People with HSP (Sensitive) Tendency

People with HSP who are sensitive to sounds, smells, and human signs are also sensitive to caffeine.
The brain judges that it is "overstimulated" and shuts down, which can cause drowsiness.

People with adrenal fatigue or hormonal imbalance

Caffeine puts a strain on the adrenal glands and also affects hormonal balance.
When people with chronic fatigue or lack of energy drink it,
Rather, the brain and body may send out a "rest" signal and become sleepy.

Is it actually related to "blood sugar levels"?

Another possibility is sudden fluctuations in blood sugar levels.

Caffeine has the effect of suppressing the action of insulin.
Some people may have disturbed blood sugar levels and become more prone to drowsiness.

Especially if you drink "sweet café latte" or "black coffee without breakfast",
Symptoms like hypoglycemia (sluggishness, difficulty concentrating, drowsiness) are more likely to occur.

Some people don't like coffee

Everyone's reaction to caffeine is different.
"Waking up" is not the correct answer, and the body's response is the "right sign for you".

People who:

• Shallow sleep quality/unstable autonomic nervous system
• Delicate and prone to stress
• Have a habit of eating sweets with them
• Weak gastrointestinal tract/prone to stomach pain

Summary: Your body's response has a meaningful reaction

"Coffee = sleepiness" does not necessarily apply to everyone.

Your body that makes you sleepy with caffeine
It may be that you are sending a proper signal that "it doesn't suit you right now".

There are other ways to combat drowsiness, such as taking a short nap, light exercise, and being exposed to light.
Know the rhythm that suits your constitution and find ways to improve your performance without difficulty.